Sewing machine



July 16, 1935. 'R. B. THOMPSON SEWING MACHINE Fild Jan. 7, 1930 4Sheets-Sheet 1 July 16, 1935. R. B. THOMPSON SEWING MACHINE Filed Jan.7, 1950 4 Sheets-Sheet 2 (Ittorhegi'.

July 16, 1935.

R. B. THOMPSON SEWING MACHINE Filed Jan. 7, 1.930

4 Sheets-Sheet July 1 6, 1935. R. B. THOMPSON SEWING MACHINE FiledJan.-'7, 1930 4 Sheets-Sheet Patented July 16, 1935 UNITED STATES.

SEWING MACHINE Reuben B. Thompson, Stillwater, N. Y., assignor toWillcox & Gibbs Sewing Machine Co., New York, N. Y., a corporation ofNew York Application January 7, 1930, Serial 'No. 413,065

12 Claims. (01. 112-132) This invention relates to a combined sewingmachine and rufiier mechanism, the latter forming a part of the sewingmachine itself but being so combined therewith that it can be instantlyput into or out of action at the will of the operator while the sewingmachine is in operation, and regardless of the speed at which it isrunning.

The work for which principally the machine hereinafter described hasbeen designed is the forming of gathers or ruflies in the upper edge ofthe back of shirts for men and boys in process of stitching said backbetween the two plies of the double yoke; but the machine is useful alsofor other kinds of work in which intermittent or continuous ruffling isrequired.

An object of the invention is to combine a ruffiing mechanism with astandard sewing machine of suitable type without making substantialchanges of construction therein; or in other words, to provide acombined sewing machine and ruflling mechanism wherein the organizationof the former remains substantially unchanged.

Another object of the invention is to provide a ruflling equipment sodesigned that, in order to requires but few changes, and such as are butslight in extent and easily made.

A further object of the invention is to provide a sewing machine havingan intermittent ruflling pact, comprising relatively few parts and hencerelatively low in cost of construction and of up keep.

A further object of the present invention is to take the power foroperating the ruffling mechanism from a driving shaft on the overhangingarm of the machine above the bed plate, the connection with said shaftbeing preferably at a point at, or in proximity to, the head of themachine, thus making possible a very compact arrangement of the ruiil-eractuating mechanism and its driving connections, all the elementswhereof may be located in close proximity to the said arm and to thehead of the machine, well above and clear of the work plate.

further object is the provision of means for throwing the rufiler intoand out of action which combine it with the sewing machine, the latter"equipment that is simple in construction, com- 'Another object in viewis the production of a much greater output than attainable with combinedsewing andrufiling machines now in use, i and at a substantially lowercost of maintenance.

Other object's'of the invention will be indicated 5 in the followingdetailed description of a machine constructed in accordance therewith,reference being made to the accompanyingdrawings which form apart ofthis specification, and wherein one embodiment'of the invention isillustrated as applied to, or combined with, the well-known commercialWillcox & Gibbs high speed lockstitch power-driven sewing machine; 'butit will be understood that the improvementsconstituting the presentinvention, though specially applicable to 15 lock-stitch machinesfmayalso be used to advantage in connection-with other types of sewingmachines" 1 i Fig. 1 is an elevation, partly in section, of therear'side of the machine (that away from the operator);

Fig; id is a viewsimilar to Fig. '1, being a completion thereof, showingparts at the left end of the machine not shownin Fig. 1;

Fig. 2 is a top plan view, some of the parts at the head-of the machinebeingomitted Fig. 3 isa partialfront elevation, some of the parts of'theheadof'the machine being omitted;

Fig.4 is an end elevation looking at the head of themachin'e';

Figs. 5, 6 and? are vertical'sections on lines 5-5, 6-6, of Fig. 1,respectively, some of the parts through which said section lines passbeing omitted; i v i 35 Fig. 8 is a horizontal section on line 8-8 ofFiat;

i Fig. 9' is a Fig. 3;- c

Fig. 10' is a view in elevation and section of the rufiler bracket;

Fig. 11 is a vertical cross section o'n'line "II-ll of Fig. 10; i

Fig. 12 is'a detail in elevation and vertical section showing theruffier driving connections in their normal positions of rest; 7

Fig. '13 is a detail in perspective of parts of the rufiler drivingconnections; and r Fig. 14 is a perspective view of other parts thereofdetached from one another.

The mainframe of the lockstitch machine shown in the drawings comprisesthe usual hollow standard I5; the-hollow arm or gooseneck l6 throughwhich extends themain shaft I1; and the head I 8, which contains theneedle-bar crank horizontal section on line 99 of of the same i9 andother parts of the stitch-forming mechanism.

The ruiller, its supporting means and also the means for lowering andlifting it into and out of position for engaging the work will now bedescribed, reference being had specially to Figs. 3, (l and 9.

The ruflier blade 20, which is or may be of ordinary construction, iscarried by a plate 2|, herein called the ruflier-foot. Said ruffler-footis pivotally supported by a narrow bar 22, herein called the miller bar,said ruffler bar being rigidly attached at its upper end to a hub 23fixed by a set screw 230 upon a horizontal tubular shaft 2 1 havingbearings in a sleeve 25 on the lower part of bracket 35, the latterbeing attached to the back part of the head l8 of the main frame. Thelower end of rufiler bar 22 occupies a space formed between a lug 21projecting'upwardly.

from rufiler-foot 2i and an arm 28, also integral with said foot, saidparts .21, 22, 28, beingall perforated for the passage of pivot screw26, the perforation in arm 22. being of such size that the shank ofscrew 26 passes freelythrough it.

Arm 28 also forms one member ofatoggledever,

whereof the other member, arm 29, is pivoted at its upper end to bar 22by-pivot stud 3|, and at its lower end has a pin 36' which engages anotch or slot in the upper end of arm 28 (Fig. 4) thus forming apin-and-slot toggle joint; Toggle lever 28, 23 is the miller liftinglever, its main function being to tilt the serrated edge of bladeupward, out of contact with. the work, when the rufiier mechanism isthrown out. of action, and con versely to depress the serrated edge ofblade 20 into; engagement with the work when themufiier mechanism isthrown into action. These operations of the ruffler lifting lever areperformed automatically at the proper times, through connec- .tionshereinafter described.

Tubular shaft 24 is the rufl'ler actuating shaft, and in action it hasan oscillatory motion ashereinafter described. It is formed with acollar 24!) which bears against the end of sleeve 25,.the 'idiameterofsaid collar being such that itscircurnference is flush with the outersurface" of said sleeve. 23 is fitted, its outer surface being alsoflush with that of the collar 240. closes a bolt 32, which is capable ofa limited lengthwise movement for the purpose. of actuating toggle-lever28, 29 as presently described.

A spring 39 acts, when free to exertits pressure, to hold ruffler blade20 in engagement with the work (full line position,Fig. 4). This springmay be variously formed. As shown :it is of resilient wire, and isattached at one end to screw 26 having several coils Wound around theshank thereof, the other end of said spring being .bent around the inneredge of bar- 22. Thus spring 29 so exerts its pressure as to keep thetoggle lever straightened out, and the serrated edge of blade 2!! incontact with the work. It follows th at the rufller blade and foot areheld while in operation with. yielding pressure. From the foregoingdescription it will be understood. that the rufller blade and itssupport are supported from the oscillatory tubular shaft 24 and when inaction are swung back and forth in the are of a circle whose center isthe axis of said shaft. Heretofore in ruffling machines in use, therufiler blade and its support have been reciprocated back and forth, asby means of a horizontal s1iding bar. The above described construction,"whereof a distinguishing feature is the radial or On the other side ofsaid collar, hub 1 Said tubular shaft en- 7 arcuate movement of themiller blade and its support, effects a material simplification ofparts, especially in respect to the support and its actuating devices,and the means for lowering and. lifting the blade into and out ofcontact with the Work. It will be observed that, while the ruffler footand blade move back and forthin the arc of a circle, yet by reason ofthe pivotal connection of said foot with rufiler bar 22, and the actionof toggle lever 28, 29 and spring 39, the serrated edge of the ruiflerblade travels back and forth in a horizontal path, in contact with thework as it lies on the work plate.

Toggle lever 28, 29 is actuated to lift the rufiler blade out ofengagement with the work by the lengthwise movement of bolt 32 withinthe tubular shaft 24. When bolt 32 is in the position shown in Fig. 9,which is its normal position, that is, the position it occupies when theruffling mechanism is not in action, its conical end 33 protrudes beyondthe end of shaft 24 and presses against the beveled edge of arm 29,turning said arm on its pivot in such direction as to bend the togglelever at its elbow 30, thus tilting the rufiler blade upwards at itsserrated end. This is the dotted line position of the parts in Fig. i.

Bolt 32 is moved positively in this direction (to the left in Fig. 9) bymeans of an arm 34 attached to cross shaft 88 (Figs. 6, 10, ll)hereafter de- 7 moved to the right, which occurs whenever the operatorthrows the ruffling mechanism into action, the conical end 33 of bolt 32is withdrawn from engagement with lever arm 23 to the positionshown inFig. 3; this being effected by the action of a helical spring 38 whichencircles the other end of the shank of said bolt. Arm 29 of the togglelever being thus released from the pressure of theconical head 33of bolt32, said lever is bent by the influence of spring 39, therebytilting-ruffler blade foot 2! downward and bringing the serrated edge ofblade into position for engagement with the work.

The means for imparting ruffling movements to: the rufiler while inaction will now be described.

an eccentric strap 46 encircling the same (Figs.

3, 4 and 5) The WillcoX & Gibbs high speed lockstitch machine has themain driving shaft in the arm and head thereof, and has on. said shaftan eccentric which serves a purpose not needed in a combined sewing andruliiing machine; said eccentric being adjacent to the needle-bar crankl9 before mentioned. 'By substituting therefor the eccentric 45 withdifferent timing, power is obtained for driving the ruifier mechanismwithout substantial change in the organization of the machine. Theeccentric strap 26 is connected through the intermediary of a pitman 41and crank arm 48, with a rock-shaft as, which has bearings in a tubularpart 5! of the vruilier bracket 35 (Figs. 1, 2, 11 and 12). Theconnection is made by means of a hub 49 formed on one end of andintegral with arm 48. Said hub 49 is fitted on one end of shaft 50, andis secured in place thereon by means of set-screw 52.

To the other end of rock-shaft 5t! is attached a curved crank arm 55,herein called the segment (Figs. 1, 5, 6 and 12), its shape beingconformed to the arc of a circle. The attachment of segparatively littlement 55 to rock-shaft 50 is effected by means of a hub 55 (Fig. 1)integral with said segment; said hub 56 being mounted upon rock-shaft 50and secured thereto by two set-screws 57. By means of eccentric 45,pitman 41, arm 48 and rock-shaft 50 the segment 55 is oscillatedcontinuously so.

tachedto a crank arm63 (Figs. 2, 3, 4, 5, 6 and 12) secured to thetubular rock-shaft 24, by which the miller blade is actuated. Block 6|(Fig. 13) is curved to conform to the shape of slot 53 and is pivotallyconnected to link 62 by screw stud 64. i By means of said link 62 motionis communicated from segment 55 to the tubular. ruflleractuating shaft24, when the ruflling mechanism is in action. Normally, however, that isto say, while the'rufliing mechanism is not in action, block i occupiessuch a position in the lower end of slot 58 that the axis of pivot stud64 is coincident with that of rockeshaft 50, in which position it isshown in Fig. 12. Therefore, while the parts. are in this position theoscillations of rock-shaft 55 and segment 55 communicate no motion tolink 62, and the rufiier actuating mechanism remains quiescent. But assoon as block 6! moves off and away from the center of oscil lation ofshaft 55, link 62 begins to reciprocate, and motionis thereby impartedto shaft 24. The parts are shown inthis operative position in Figs. 1,4, 5 and 6. It is obvious that the further block 6! is moved in slot 58of segment 55 away from the axis of rock-shaft 50, the greater will bethe arc of oscillation of shaft24, and the longer the throw or rufflingmovement of the ruliler blade 28.

It is a feature of the invention that block 5| is always in engagementwith slot 58, so that, in putting the rufiier into and out of operation,the action is not like that of a clutch, in which there is an engagementand a complete disen-.

gagement of parts. The mechanical connection between the parts 55 and 62is always complete. What changeswhen the control mechanism is operatedis merely the point of connection between those parts.

It is also a feature of the invention that the power for actuating therufller is taken from a point near where the latter is located, which isnear the head of the machine, instead of from a point near the other endof themachine, as heretofore. Therebyia substantial gain in compactnessis effected; with a cohsequentsaving in the size, weight and cost of theconnecting. ele- There is also aresulting gainin cermerits; taintyandease of operation and in facility of manipulation on the part of theoperator.

As will be seen, by reference specially to Figs. 2 and 3, the operationof the miller blade by power taken from the through short and light, andwhich therefore add comto the cost, weight and complication of themachine as a whole. The direction of the driving connections is firstdownwardly from the main shaft by a short pitman 4,1; thence rearwardlyto the back of the machine by a short arm 48; thence along the back ofthe mamain shaft is effected driving connections that are relativelychine towards standard [5 by a rock-shaft 50, which need be only alittle longer than necessary to clear the head l8 of the machine; thenceforward across the machine and under the arm Hi to the front of themachine by link 62; and thence by tubular shaft 24 to the rufflersupportingarm 22. Looked at from above (Fig;"2) the entire system ofdriving. connections presents approximately'the outline of a rectangularfigure of small dimensions.

Further it will'be seen that the means (hereinafter described), wherebythe rufiler mechanism is put into and out of action at the will of theoperator, are located at the rear of the arm of the machine near thehead thereof, and that the connections for operating said controllingmeans are all on the side of the machine away from the position of theoperator.

The means, under control of the operator of the machine, for putting theruffier into and out of action will now be described. The movement ofcontrolling block 6| in the curved slot 58 of oscillating segment 55,whereby the rufiler is put into or out of action at the will of theoperator, is effected through the intermediary of a slide 10, movablevertically between ways formed by the vertical' away in Fig. 1), a toppiece H2, and an oil-drip plan 1 l4.

From top piece 'HZtwo stems 94 (Figs. 1 and 7) extend downwardly withinthe housing, each stem having a screw-threaded upper end which is tappedinto said top piece. Each stem 94 is encircled by a strong helicalspring 93 and each stem with its spring extends into a socket formed inslide 10. Each spring bears at its upper end against said top piece. H2and at its lower end against the bottom of its socket.

Housing H has an opening in the side wall thereof adjacent to the headof the machine (Fig. 1) through which opening extends a member 12 whichis attached to slide 10 by screws 16, 16. Said part 12 is shown inperspective, its several parts detached from each other, in Fig. l4.Between ledge 11 and bottom plate 18 of said slide member 12 is aguide-way wherein is positioned the rounded end of link 62 (Figs. 1, 5,6 and 12). Consequently when slide 10 with its member 12 is moved ineither direction the end of link 62 moves with "it, thus moving block 6|in slot 58 of segment 55. When slide 10 is in its lowermost position, itbeing then held by the pressure of springs 93 against stop-pin 13 (asshown in Fig. 7) the end of link 62 is in line with the axis ofrock-shaft 55 and the ruiiier actuating shaft 24 is consequentlymotionless. When, however, slide 70 is moved upwardly, compressingsprings. 93, block 6 I and with .it the pivot studs 64 are moved 1 offand away from the axis of rock-shaft 50, and

the ruffier mechanism is put into operation.

The upward movement of slide 10, carrying with it the free end of link62, also releases arm 82 of a. short horizontal shaft 85 from thedownward pressure of saidlink G2. Said shaft 80 also carries thedownwardly projecting arm 34, which, as already described, bears againstpin 36 of bolt 32, keeping the latter normally in the position shown inFig. 9, to lift the rufiler blade .2!) out of engagement with the workto the position in which it is shown in dotted lines in Fig. 4. But whenmechanical connection between the slide housing I l,

of the rufr'ler blade, as

i the .presser-bar .919 (shown in Iin Fig. 4. Springs 38 and 39 arenormally under compression and ready to act as soon as they are releasedfrom the pressure of the stronger springs 93.

Thus the upward movement of slide 10 effects two results, one bypositive action, the other automatically. First, it brings about, byshifting the position of block ii in slot 53, an active relationshipbetween the driving shaft 21 of the sewing machine and theruffler-actuating shaft 24, the those parts being always complete; andsecondly, it effects automatically, through the action of springs 38 and39, the depression of the serrated end of the miller blade into contactwith the work.

The connections for moving slide 19 upwardly at the will of the operatorin order to throw the ruflier into action are illustrated in Figs. 1, 2and 7. As there shown, a bell-crank lever 85 is pivoted at 86 to a' lug15 (Fig. 2) on the side of one of the arms'of said lever being pivotallyconnected to slide 19 near the lower end thereof by means of a link 87.Said link 31 connects pivotally, by means of screw stud 89 (Figs. 1, 7and 8) with slide 19. Screw stud 89 passes through a slot in cover plate'1 ID. The other arm of bell-crank 85 is connected by a link 88 with onearm of a second bell-crank so, pivoted at 91 to standard 65; and to theother arm of lever 90 is attached a rod 92 (Fig. 1d) leading toasuitable actuating device, such as a treadle or a knee-piece,not shown.In Fig. 1, the bellcranks 35 and 9i] and connected parts (includingslide 19) are shown in full lines in the positions they occupy when theruffler is in action, and in dotted lines in the positions they occupywhen the ruffler is out of action, at which time slide IE3 is in contactwith stop-pin 13.

When slide '59 is moved upwardly by the means just described, or byother suitable means, it compresses springs 93, so that said springs,when free to act, move slide 10 downward to the position shown in Fig.Lin which position of the parts, the axis of the pivot stud E4 on slideblock 6 l is in line with that of shaft 59, the rufiler mech 'anism isstationary. and the ruffier blade is tilted upwardly out of contact withthe work, as already explained.

For the purpose of adjusting the throw of the ruiiler blade, so as toproduce ruffles of different widths, an adjustable stop screw 95 isprovided (Figs. 1, 3 and '7). I Said screw 95 has a milled head, and itsscrew-threaded shank passes through and engages a i ll! of the slidehousing 1 i a milled edge lock nut 96, also in engagement withstop--scew 95, being provided for holding said stop screw in itsadjusted position. The position of stop-screw 95 determines the limit ofthe upward movement of slide it; and this in turn determines the throwalready explained. Thus, to formwider rulfles stop-screw 95 is adjustedupwardly, and to form narrower ruflies it is adjusted downwardly.

The treadle operated connections for lifting threaded hole in top pieceFig. 1) are of the located on and supported from the head andoverhanging arm of the frame of the sewing machine, said'means beginningwith the main shaft and the eccentric ,45 thereon and terminating at therear side of said head and arm of the frame in the segment 55 which isoscillated continuously so long as the machine is in operation;

(1)) Driving connections from said driving means to the rufiler blade20, said connections being mounted on-and supported from the head andoverhanging arm of the frame and beginning with the block El slidable inslot 58 of the segment 55, and extending from said block at the rearside of the machine beneath the overhanging arm of the frame to andalong the front of the machine at the head thereof and thence dependingto and terminating with the rufller-foot 2i and the rufiler bladeattached thereto.

(c) Means'under control of the machine operator for shifting the pointof connection between said driving means and driving connections, thatis, shifting said slide block 6| in the slot of segment 55 from aposition in which no movement is imparted to the driving connections toa position for imparting movement thereto and vice versa, said controlmeans beginning with a suitable knee-piece or treadle (not shown) andterminating in the slide 19 and parts thereon which constitute aguide-way engaged by the rounded and of the link 62. Except for theconnections to the knee device, the parts constitutsuch control meansare supported from the overhanging arm of the machine at the rear sidethereof.

((1) Means associated with said driving connections for automaticallymoving the ruiiler blade into or out of operative position forengagement with the work according to whether the driving connectionsare, or are not, being actuated from the driving means.

It will be understood that the mechanism hereinbefore described andillustrated in the drawings is merely one form in which the inventionmay be embodied, and is not to be taken as limiting the scope of theinvention as defined in the appended claims.

What is claimed as. new is:

1. The combination with a sewing machine having an overhanging arm and asewing head at'the end thereof, of a driving shaft journaled on-saidarm; ruffiing mechanism; actuating connections thereto from said shaftall mounted on said headand arm and including a rock-shaft journaled onsaid head and located at the back of the machine, means located at saidhead of the machine for driving said rock-shaft from said driving'shaft,and other means actuated by said rock-shaft and extending beneath saidoverhanging arm from the back to the front of the machine; and meansunder control of the operator for-throwing said ruffling mechanism intoand out of operation.

2. The combination with a sewing machine having a standard, a hollow armconnected at one end with said standard and at the other with the headof the machine, and having a shaft extending through said arm, of arufiling device; actuating mechanism therefor; driving connectionsreceiving power from said shaft at said head of the machine; and meansfor throwing said driving connections into and out of operative relationwith said actuating mechanism, said means comprising an oscillatingsegment located at the back side of the machine near the head thereofand a link extending beneath said arm connected at one end with saidrufiier-actuating mechanism and having at its other end a pin-and-slotconnection with said segment.

3. In a combined sewing and ruffling machine, the combination with thearm and head and with a driving shaft extending along the former andinto the latter, of an oscillating segment driven from said shaft; amiller blade; a rock shaft by which said blade is carried; a connectinglink attached at one end to an arm of said rock shaft and at the otheradjustably engaged with said segment; and means operable by the operatorduring the running of the machine for moving the free end of said linkrelatively to the axis of said segment.

4. The combination with the driving shaft of a sewing machine, of anoscillating member receiving motion therefrom; rufliing mechanismincluding an actuating shaft; a link attached at one end to an arm onsaid actuating shaft and at its other end being in adjustable engagementwith said oscillating member, the point of engagement beingsubstantially in line with the axis of oscillation thereof when theruifling mechanism is not in action; and means under the control of theoperator for moving the free end of said link away from the axis ofoscillation thereby to put said ruffling mechanism into action.

5. The combination with a sewing machine; a ruiiiing device andconnections for actuating the ruifiing device from a driving shaft ofthe sewing machine; of means for throwing said ruffiing device into andout of action, said means comprising a slide mounted in a fixed guidewayon the frame of said machine and movable to different positions tocorrespondingly vary the movement of the rufliing device; means undercontrol of the operator for moving said slide while the machine is inoperation in the direction to throw the rufiiing device into action; anda spring for returning said slide to its normal position.

6. The combination with a sewing machine, of a ruflling devicecomprising a ruilier blade and a pivoted support therefor; drivingconnections for operating said rufiiing device from a shaft of saidsewing machine; means under control of the operator for throwing theruffiing device into and out of action, said means comprising a slidemounted in ways of the sewing machine frame; and connections for tiltingsaid ruflier blade support downward when the rufiier is thrown intoaction and upward when it is thrown out of action, said last namedconnections being also actuated by said slide.

7. The combination with a sewing machine having an overhanging arm, asewing head at the end of said arm and a driving shaft on said arm andhead, of ruffling mechanism and driving connections therefor all mountedon said arm and head and including a rock-shaft located at the rear ofthe machine, means for driving said rock-shaft from said driving shaft,and other means actuated by said rock shaft and extending across saidarm from the rear to the front of the machine. 7

8. The combination with a sewing machine having an overhanging arm, asewing head at the end of said arm and a driving shaft journaledthereon, of rufiler mechanism comprising a rufiier actuating shaft anddriving connections therefor all mounted on said arm, said connectionscomprising actuated members extending and trans mitting power from saiddriving shaft along the rear side of. said head to said rufiieractuating shaft.

9. The combination with a sewing machine and its driving shaft, ofruffling mechanism comprising a tubular actuating shaft; an arm attachedthereto; a rufiler blade pivotally attached to said arm; a lifting leverfor turning said blade on its pivot; a spring for holding said bladeyieldingly in contact with the work while the ruffler is in action;means .under the control of the operator for putting said tubular shaftinto and out of operative relation with said driving shaft; a boltmovable within said tubular shaft; and connections for actuating saidbolt when the ruffler is put out of action to tilt said blade out of contact with the work.

10. The combination with a sewing'machine and its driving shaft, ofrufliing mechanism comprising a tubular actuating shaft; a rufiied bladepivotally attached to an arm fixed to said shaft; a lifting lever forturning said blade on its pivot to an operative and an inoperativeposition in respect to the work; a bolt movable lengthwise within saidtubular shaft for operating said lever to tilt it out of operativeposition; a spring for returning said lever to operative position whenreleased by said bolt; and means under the control of the operator forputting said actuating shaft into and out of. operative relations withsaid driving shaft and for simultaneously moving said bolt in onedirection or the other.

11. The combination with a sewing machine having an overhanging arm, a.sewing head at the end thereof and a driving shaft journaled on saidarm, of rufiiing mechanism; driving connections therefor all mounted onsaid overhanging arm and actuated from said driving shaft and includinga rock-shaft located at the back of the machine, means located at thehead of the machine for driving said rock-shaft from the driving shaft,and other means actuated by said rock-shaft and extending beneath saidoverhanging arm from the back to the front of. the machine; and meansadapted to be actuated by the operator while the machine is in operationfor throwing said rufiling mechanism into and out of operation.

12. The combination with a sewing machine including its driving shaft,of ruiiling mechanism comprising an oscillatory shaft located at thefront of the machine, an arm attached to said shaft, a rufiier bladeattached to the free end of said arm, and driving connections comprisingactuated members extending and transmitting power from said drivingshaft along the rear side of the machine to said oscillatory shaftwhereby said blade is swung back and forth in the arc of a circle.

REUBEN B. THOMPSON.

